docs: def getlanguage(self, language=None, windowsversion=None):
          """
          Get and return the manifest's language as string.
          
          Can be either language-culture e.g. 'en-us' or a string indicating 
          language neutrality, e.g. 'x-ww' on Windows XP or 'none' on Vista 
          and later.
          
          """
          if not language:
              language = self.language
          if language in (None, "", "*", "neutral"):
              return (LANGUAGE_NEUTRAL_NT5,
                      LANGUAGE_NEUTRAL_NT6)[(windowsversion or 
                                             sys.getwindowsversion()) >= (6, )]
          return language